Our financial representatives have an incredible opportunity to positively impact people’s lives - the lives of their clients, their families and those in their communities. They take this responsibility seriously and so do we. We provide them with the training and support they need to ensure their success, but we know it is their productive work ethic, strong relationship skills and professionalism that make them extraordinary.

 John Justin Weber

John Justin Weber

Managing Director

My Networks: LinkedIn

John Weber is Managing Director in the District Network Office (DNO) in Sioux City, Iowa. The Siouxland DNO houses 5 full-time Financial Representatives and staff. The DNO also has 9 detached Financial Representatives in the Siouxland area.

John attended South Dakota State University and joined Northwestern Mutual in 2000 as a financial representative.  John earned Pacesetter first 40 in 2000, Bronze Award in 2001, Silver Award in 2002 and achieved MDRT in 2004.   He became a College Unit Director in 2003, and a Recruiting Field Director in 2008 and a Managing Director in 2011.  During that time, John has lead 3 top 25 college internship teams, and has twice been recognized as the Top Field Director in his market category.  He has also earned the National Quality Award in 2002-2010 and the National Sales Achievement Award in 2010.

John and his wife, Sara have four children Austin, Drew, Ian, and Reese.

John is involved in the following community and service organizations:

  • Juvenile Diabetes Research Foundation- (JDRF) Top 5 fundraising team Drew’s Dreams 2009-2012
  • Farmhouse Fraternity Alumni Association Board Member
  • Sioux City Chamber of Commerce
  • Meals on Wheels 


To get in touch with John, please contact his Executive Assistant, Marissa Pronschinske at (712) 244-5022, or at

 Marissa Rene Pronschinske

Marissa Rene Pronschinske

Executive Assistant

Marissa joined the Sioux City Office May of 2018. Marissa is licensed in heath and life and will be assisitng our Managing Director, John, with his case prepatory work and client relations. As the Exectuvie Director Assistant, Marissa is responsible for helping with the growth of Northwestern Mutual- Siouxland. Marissa is a graduate of Briar Cliff University and has future plans to attend law school. In addition, to her role with us, Marissa is also a tumbling and dance coach at 5678! dance studio in North Sioux. In her spare time, she enjoys watching Netflix with her cat, Chester.  

 J. Doug Davis

J. Doug Davis, CLU®

Financial Advisor

After two years as a teacher and coach in rural Iowa's secondary education system, I found I wanted a career that would be meaningful and allow me to make a greater impact on the community in which I lived.

I worked as a credit manager for a loan company for 1 year but was not satisfied that my career was taking the direction I wanted for myself and my family.

I have always been proud of the mutual decision made over 30 years ago to contract with Northwestern Mutual as a Financial Representative. The positive influence of the company's culture on my life and the lives of our clientele is without parallel.

Doug Davis served as President of the Sioux City Suburban Rotary Club in 1999 and has been an active member since 1979.  He is a lifetime member of the University of Iowa Alumni Association and has been a member of the National Association of Insurance and Financial Advisors (NAIFA) for over 20 years.  Doug lettered in wrestling under legendary Coach Dan Gable at the University of Iowa and is proud of his long association with the University of Iowa.

 Jina R Davis

Jina R Davis

Associate Financial Representative

 Philip John Sorensen

Philip John Sorensen

Financial Advisor

My Networks: LinkedIn Facebook




 Taylor James Cassady

Taylor James Cassady

Director of Strategic Development

Taylor joined the Sioux City Office June of 2018. Taylor is licensed in health and life insurace and will be assisitng our interns and full time Financial Advisors in case prepartory work for new and exisitng clients. As the Director of Strategic Devolopment for the Sioux City Office, Taylor is also responsible for managing the business operations of the Siouxland Office to enhance productivity and profitabilty. Taylor is a graduate of California State University- Long Beach and will be attending Upper Iowa Univeristy for her MBA in Human Resource Managment. In her spare time, Taylor enjoys adventuring around her new midwest home with her huskey Milo.

 Travis P Ten Napel

Travis P Ten Napel

Financial Advisor

Travis Ten Napel served 6 years actively in the Army National Guard and concluded his service as a Sergeant. While serving in the military, Travis attended the University of Iowa and got his Bachelor Degree in Finance from the Tippie College of Business.


Travis started with Northwestern Mutual as an intern in May of 2012. He was a Target 20 intern and a College Team Captain leading the #1 intern team at the University of Iowa. He began his full-time contract in July of 2013.


Off to a quick start, he accomplished 10 in 6, Pacesetter First 40, Second 60, Rookie of the year for the Agency, Bronze Top 50, and finished 6th overall in the Company for the Mike Gish Award. The following year he finished with a Silver award and won the New Financial Representative of the Year for the Agency. Most recently Travis received the Gold award in 2016.


Travis is part of the Siouxland District out of Sioux City, Iowa. He works out of his own office in Sibley, IA and lives in town with his wife and son. Travis is active in his community of Sibley as a member of Rotary, Sibley Golf Commission, Chamber of Commerce, and helping with his church’s High School Youth program.


Travis prides his business on timely customer service with the team he brings to table as well as educated decision making, being a Financial Advisor with a bachelor’s degree in Finance.


Nisa N Deboom

 Rick Dehner

Rick Dehner, CLU®, ChFC®, CFP®, CLTC®, RICP®

Wealth Management Advisor

My Networks: LinkedIn

Rick joined Northwestern Mutual in 1991. As a Northwestern Mutual Wealth Management Advisor, Rick has the education and experience to fully understand clients’ complex financial issues and is able to offer a full spectrum of financial planning solutions. In addition to insurance products and brokerage services, Rick has access to a variety of investment advisory services, trust services and private client services to meet the needs of individuals, families, business owners, trusts and estates.   

Rick was named a Field Director for Northwestern Mutual in 2012. He is a member of the National Association of Insurance and Financial Advisors (NAIFA) and the Million Dollar Round Table. He has been involved in several community organizations including the Siouxland Estate Planning Council, Siouxland Community Foundation, Hinton Community School Foundation, the Siouxland Chamber of Commerce, and St. Michael’s Church Endowment Committee, to name a few. He holds a Bachelor of Arts degree from Briar Cliff University. In addition, he has furthered his knowledge by earning the Chartered Life Underwriter (CLU®), Chartered Financial Consultant (ChFC®), Certified Financial Planner (CFP®), and Certified in Long Term Care (CLTC) professional designations.

Rick lives in Hinton with his wife Jan. He has two married daughters and a grandson.

 Brenda M Groves

Brenda M Groves, CLU®

Brenda began her career in 1999 and joined Rick Dehner and Northwestern Mutual in 2002. She is licensed in life and health insurance and is Series 6 and 63 registered. She completed her CLU designation in 2017.

As an AFR, Brenda may assist you with the following:

  • Provide quotes for life, disability, long term care and health insurance products

  • Process loan, billing & EFT requests as well as annuity & IRA contributions/distributions

  • Expedite owner, beneficiary, payer, name and address changes

  • Schedule insurance exams, facilitate underwriting, provide support for claims processing

  • Process new accounts and assist in case preparation for core and investments

  • Provide policy detail information and most customer service requests

Brenda currently resides in her hometown of Lawton, Iowa with her husband. She has two adult children and three grandchildren. she enjoys spending time with her family and friends. She is a supporter of the local Backpack Program and the Council on Sexual Assault and Domestic Violence (CSADV). Her other hobbies include movies, music, yoga and reading.

 Janet C Dehner

Janet C Dehner

Associate Financial Representative

Jan joined the office of Rick Dehner and Northwestern Mutual in 2007. Jan assists Rick with case preparatory work for new and existing clients. She is licensed in life, health, and long term care. As the Marketing Coordinator for Rick’s office, Jan is responsible for all marketing and public relations for that office. Jan is a graduate of Creighton University in Omaha, Neb. In addition to spending time with her family, she enjoys biking, reading, gardening, and traveling. She has served on boards for United Way of Siouxland.

 Carolyn J Ohlfest

Carolyn J Ohlfest, CLU®, ChFC®, MSFS

Financial Representative

Carolyn has over 36 years of  experience assisting my clients and friends with their financial needs. She has earned her Chartered Life underwriter (CLU®), Chartered Financial Consultant (ChFC®) and Masters degree in Financial Services(MSFS). She works closely with other professionals to build a team of advisors uniquely suited to their situation.

She has been married to Doug  since 1973. They have 2 married children and 3 grandchildren. She enjoys her volunteer work at Youth for Christ and has led  over 15 mission trips to Mexico and Nicaragua.

 Dan Sliefert

Dan Sliefert, CLU®

Financial Representative

Dan Sliefert has been an agent with Northwestern Mutual since August 1987.  He is married to his wife Traci and they have a total of 12 children plus.  They have enjoyed being foster and adoptive parents for over 20 years and have had the privilege of adopting seven children and having continuing relationships with many others.

He loves to camp, boat, fish and spend time with his family especially outdoors.    He is also an avid Vikings, Twins and a Hawkeyes fan.

His background prior to Northwestern Mutual was a degree in accounting.  He really enjoys the flexibility his career has allowed him along with real sense of making a difference with his clients. “It’s the best job I have ever had even though at times it can also be the most challenging”.   

 Larry E Hecht

Larry E Hecht, CLU®, ChFC®

Financial Advisor

After receiving his BA from Buena Vista University in 1972, Larry Hecht worked with a livestock feed company in sales and management for six years. Larry made his career change in November, 1978. He has since attained both his Chartered Life Underwriter (CLU®) and Chartered Financial Consultant (ChFC®) designations, as well Certification in Long Term Care CLTC during his career with the Northwestern Mutual.

Since 1983, Larry Hecht has been a member of the Storm Lake Rotary Club, serving as President in 1990-1991. Larry also currently serves on Boards of Trustees for Iowa Central Community College, Methodist Manor Retirement Community, and Genesis Development, which services adults with disabilities.

 Terri Ann Treiber

Terri Ann Treiber

Financial Representative

Career Changers

Changing careers doesn't have to be daunting. Coming from many different backgrounds and occupations, our financial representatives go on to develop successful business practices. With support from a quality organization, it can be an easy transition.

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